scanner Demo04

package com.chen.scanner;

import java.util.Scanner;

public class Demo04 {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);

//从键盘接收
int i = 0;
float f = 0.0f;

System.out.println("请输入整数：");

//如果...那么
if (scanner.hasNextInt()){
i = scanner.nextInt();
System.out.println("整数数据："+ i );
}else{
System.out.println("输入的不是整数数据！");
}

System.out.println("请输入小数：");
//如果...那么
if (scanner.hasNextFloat()){
f = scanner.nextFloat();
System.out.println("小数数据："+ f );
}else{
System.out.println("输入的不是小数数据！");
}
scanner.close();
}
}